In this photo taken Dec. 9, 2015, Assistant House Minority Leader Jim Clyburn of S.C., speaks on Capitol Hill in Washington. Americans have questioned the state of race relations after gun violence directed at police officers as well as shootings by police. Last week, a black Army veteran killed five police officers in Dallas in revenge for police shooting black men in Baton Rouge, Louisiana, and the Minneapolis suburbs. Andrew HarnikAP

In this photo taken Dec. 9, 2015, Assistant House Minority Leader Jim Clyburn of S.C., speaks on Capitol Hill in Washington. Americans have questioned the state of race relations after gun violence directed at police officers as well as shootings by police. Last week, a black Army veteran killed five police officers in Dallas in revenge for police shooting black men in Baton Rouge, Louisiana, and the Minneapolis suburbs. Andrew HarnikAP